title: Optical sensor arrays for chemical sensing: the optoelectronic nose.
abstract: A comprehensive review is presented on the development and state of the art of colorimetric and fluorometric sensor arrays. Optical arrays based on chemoresponsive colorants (dyes and nanoporous pigments) probe the chemical reactivity of analytes, rather than their physical properties. This provides a high dimensionality to chemical sensing that permits high sensitivity (often down to ppb levels), impressive discrimination among very similar analytes and exquisite fingerprinting of extremely similar mixtures over a wide range of analyte types, both in the gas and liquid phases.
authors.affiliation: Department of Chemistry, University of Illinois at Urbana-Champaign, 600 S. Mathews Av., Urbana, Illinois 61801, USA. ksuslick@illinois.edu.
authors.forename: Jon R
authors.initials: JR
authors.lastname: Askim
authors.forename: Morteza
authors.initials: M
authors.lastname: Mahmoudi
authors.forename: Kenneth S
authors.initials: KS
authors.lastname: Suslick
mesh_terms: D002623:Chemistry Techniques, Analytical; D062609:Electronic Nose; D046228:Microarray Analysis; D061848:Optical Imaging